Image is Representational - See Manufacturer Specs | Fan Centrifugal Voltage: 115VAC Frequency: 50/60Hz Dimensions: 190x68.5mm Flow rate: 341.1 cfm Power: 70W Fan Speed: 2450rpm Ball Bearing A centrifugal blower with 190 mm diameter 68.50 mm width Supply Voltage: 115VAC Rated power : 70W a fan speed of 2450 RPM a flow rate of 341.1 CFM Noise level :60 dBA and having temperature range of -25 �C to 75 �C. It has a ball bearing type.